Cylinder-tooth.



w. STOFFEL.

CYLINDER TOOTH.

APPLICATION HLED APRJ, 1915.

1,167,667 Patented Jan. 11, 1916.

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WALTER STOFFEL, OF GREENLEAF, KANSAS.

CYLINDER-TOOTH.

Specification of Letters Patent.

Patented Jan. ii, rein.

Application filed April 7, 1915. Serial No. 19,731.

To all whom it may emcem:

Be it knownthat I, WALTER S'rorFnL, a citizen of the United States, residing at Greenleaf, in the county of Washington and State of Kansas, have invented certain new and useful Improvements in Cylinder- Teeth, cation.

My invention relates to an improved tooth means, designed to be used in conjunction with a threshing machine cylinder structure, which is reversible to'present complemental facing members, one of which may be moved to supplant the other after the latter has become worn.

The object of my invention is to provide a tooth means that is reversible, materially increasing the longevity thereof, and wherein the facing members can be removed and reversed without causing the tooth to be detachedfrom the cylinder bars.

The above and otherobjects are accomplished by such means as are shown in their preferred form in the accompanying drawings, described in the following specification and more specifically pointed out in the appended claims.

In the drawings likenumerals designate like parts throughout the several views and in which: a

Figure 1 is a fragmentary view showing the usual form of threshing machine cylin der in section and illustrating my improved tooth means in conjunction therewith. Fig. 2 is a side elevation of my invention showing the facing member removed. Fig. 3 is a vertical sectional view of the facing member. Fig. 4 is a transverse sectional view of the facing member. Fig. 5 is an edge view of the supporting means for the facing member. Fig. 6 is a detail view showing a fastening member which is used. 7

In the drawings I have shown my invention in correlation with a threshing machine cylinder structure of the usual construction, yet it is to be understood that my device is not limited to such employment and that the same may be arranged in connection with cylinder structures of other types if it is so desired.

of which the following is a specifiin a corresponding .portlons 1'3 and 1%, 1s a tapering supporting independent facing member is substituted. It is evldent therefore that the longevity of the tooth is materially increased.

As set forth above my invention includes a facing member presenting complemental wearing structures which are reversible in order that one of the wearing structures may be substituted for the other after the latter one has become worn.

In consistence with the foregoing, I employ a tooth element for supporting the improved facing structure, which includes a shank 11. With view of accommodating a fastening member 12, a portion of the shank is provided with screw threads 13, yet I desire to point out that other fastening means may be substituted if it is so desired. The opposite terminal of the shank is enlarged to form opposite squared shoulders 13 and 1% respectively, which are pro vided with a transverse opening 15 and serve the purpose that Wlll presently appear.

Preferably formed integral and arranged plane with the shoulder structure 16 designed for the purpose of receiving the facing member as will be hereinafter described. The structure 16 is beveled adjacent its longitudinal edges and free end as at 17 in Fig. 5, whereby a more eflicient connection with the facing member may be obtained. The longitudinal edges of the structure 16 being spaced from the respective terminals of the shoulders 13 and 14, provide opposite supporting pro jections 18.

ner opposite faces of the flanges are cut at an angle as shown at 22 for forming a continuous beveled way for receiving the correspondingly formed portion of the supporting structure 16.

It is pointed out that the terminals 23 of the flanges 21 terminate short of the respective ends of the arms 20 and when the facing member is in an operativeposition, abut the faces of the supporting pro jections 18 to serve as an auxiliary means for attainlng the complete rigidity of the 7 structure.

Openings 24: are arranged adjacent the respective terminals of the arms 20 and are adapted to register with the opening 15 in the shoulders 13 and 14c, for accommodating a fastening element 25. The co-action between the fastening element 25 and the wedging action resultant from the abutment of the lower ends of the flanges and the projections 18, is thought to be readily apparent. It is further obvious that this method of fastening forms an important feature of the device, as the positive rigidity of the fastening member is assured.

In operation the shank 11 is first disposed through an adjacent angle bar 10, after which the fastening element 12 is operated so as to draw the enlargement 26 of the shank into binding engagement therewith. This specific fastening arrangement serves to hold theshank rigid upon the cylinder during the operation thereof. The facing member is now disposed over the supporting structure 16, the openings 24 and 15 coinciding to allow the insertion of the fastening member 25. As set forth above, the co-action between the beveled faces of the supporting structure 16 and the correspond ingly formed opposite faces of the flanges 21 is thought to be readily obvious. This means prevents the lateral displacement of the fastening member while in operation, and also serves to attain a uniform rigidity between the fastening member and its supporting structure.

The material used in the construction of my improved tooth means may be varied to prove efficient under the existing circumstances.

In reducing my invention to practice, .I find that the form referred to herein as the most practical and preferred embodiment is the most efficient; but realizing that certain conditions will necessarily vary in concurrence withthe adoption of my device, I desire to emphasize the fact that various minor changes in the details of construction and proportionof parts maybe resorted to when required, without sacrificing any of the advantages of my invention as defined in the appended claims.

Having thus fully described my invention, what I claim .as new and desire to secure by Letters Patent is:

1. In a device of the character described, a shank structure, a support on said shank structure, opposite shoulders arranged intermediate said shank structure and said support andprojecting beyond the longitudinal edges thereof, a reversible facing member carried on said support and engaging the outer faces of said shoulders and means detachably'connecting said shoulders and said member, substantially as described.

2. In a device of the character described, a shank structure, a support arranged at one end of said shankstructure, shoulders -formed-intermediate said support and said shank structure, a substantially U-shaped facing member carried on said support and engaging the outer face of said shoulder and means connecting said member and said shoulders, substantially as described.

3. In a device of the character-described, a shank structure, a supporting structure formedintegral therewith, opposite shoulders formed from said shank structure,'a

facing member, opposite flanges arranged on said facing member and adapted to engage the respective sides of said supporting structure, said supporting structure being beveled adjacent its respective longitudinal edges and adjacentthefree end thereof, the inner opposite faces of said flanges being beveled for engagement therewith, and means for securing said :facing member to said-shoulders, substantially as described.

4. In a device ofthe-character described, a shank structure-and supporting structure "formed integral therewith, opposite shouldersarrange'd intermediate said supporting structure and said shank structure, a facing member, opposite flanges carried by said facing-member and embracing said supporting structure, and fastening means extending through said shoulders and having connection'with said facing member, substantially as described.

5. In a device of the character described,

.a shank structure, a supporting structure formed integral therewith, shoulders formed intermediate said support and said shank and projecting beyond the longitudinal edges thereof, a substantially U-shaped member, inwardly projecting flanges formed In testimony whereof I aifix my signature on said facing member tcf embrace sagd supin presence of two Witnesses.

porting structure, said acin mem er engaging the outer faces of said shoulders, WALTER STOFFEL' and a fastening member extending through Witnesses:

alined openings in said shoulders and said CHARLES B. Ross,

facing member, for the purpose specified. THEO. LINDEMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

